Sand-strip.



G. 0. WOOD.

SAND STRIP.

APPLICATION FILED'DEG. 9, 1913.

Patented Jan. 26, 1915.

2 SHEETS-SHEET 1.

' 0. 0. WOOD.

$AND STRIP.

APPLICATION II-LED 1530.9.1913,

Patented Jan. 26, 1915.

2 SHEETS-SHEET 2.

Jaw anion in the art to which it appertains to make and use the same,reference being had to- CHARLES o. wooi), or oHAMBEi'esBU'RG,PENNSYLVANIA.

SAND-STRIP.

Specification of Letters Patent.

Patented Jan. 2a, was.

Application filed December 9, 1913; Serial No; 805,605.

I To all whom it may concern Be it known that I, CHARLES O. VVoon, acitizen ,of the United States, residing at Chambersburg, in the countyof Franklin and State of Pennsylvania, United States of America, haveinvented certain new and useful Improvements in Sand Sti'ip'syandi I dohereby declare the followingtq be a full, clear, and exactdescription ofthe in vention, such as will enable others skilled the accompanyingdrawings, and to letters or figures of reference marked thereon, whichform a part of this specification.

My invention relates to molders flasks, in particular to the arrangementand construction of the sand strips thereof, whereby I am enabled to usesand strips Without guide slots and the customary pins fastening andguiding them, and at the same time provide suitable supports and guidemeans for the strips.

The difficulty experienced in practice with sand strips having guideslots through which pass the pins for limiting the movement of thestrips and for guiding them has been that the sand would pack in theseslots and prevent the strips from being pulled out totheir full extent,thereby preventing that portion of the sand mold retained by the strips'from being removed from the cope. a

Sand strips hitherto in use left a groove at the joint between the twoadjacent flask portions of the mold entirely around the mold, so thatwhen the sand was supported by a jacket during the pouring of the metalinto the mold, the metal often broke through the groove at the cornerswhich were un-.

supported by the jacket. This objection I avoid by constructing the sandstrips in such a manner that there is no groove at the corners.

. Referring to the drawings, in ,whichlike parts are similarlydesignated, I have deemed it suflicient to show only the cope of theflask, as a member of the flask to which the sand strips are secured.

Figure 1 is an inverted perspective of the cope showing my inventionattached there,

to. Fig. 2 is a bottom plan view ofthe cope. Fig, 3. is a section on theline 3*?) of Fig. 1. Fig. 4 is a section on the line round flasks.

4 1, of Fig. 2. Fig. 5 is a detail showing a modification. Fig. 6 is amodification of retaining hook and strap, the sand strip being brokenaway to show the shape of the end of the hook, andFigs. 7 and 8 showother slight variations in structure required by the form of flask towhich the strips are applied.

I have illustrated my invention in connection'with a four-sided flask,however, I wish it to be understood that the same may be applied to. anyflask, no matter what number ofsides it may have, and including I havealso illustrated a cope as the flask member to which the sand strips areapplied although it may be equally well applied to a drag or to a checkmember. When the drag is provided with sand strips, the mold does notremain on a bottom board, but is set down for casting without suchboard. The cope C isprovided with corner plates 2 at diagonally oppositecorners, which corner plates are slightly thicker than the sand strips.At the other corners, that is to say, at the corners alternating withthose provided with corner plat/cs2, brackets 3 are provided over whichextend the corner extensions 4 of the sand strip 5, and between thesebrackets is mounted .a cylindrical member 6, through which passes a bentrod 7, acting as an operating handle, and journaled in the brackets,said rod being secured in the member 6 by a set screw or other manner.Byfsupporting the cope C above its drag or other member next below itand at the'corners, the sand strips are free throughout the length oftheir body portions and operate more easily, and the ,construction isfacilitated and cheap end. By using a corner extension 4 on the strip 5the force required to actuate the StI'lpSiriS uniformly distributed andsymmetrically applied to the strip, and the liability of one side of thestrip to spring when undue friction happens to be encountered by thestrip, is greatly decreased. The cylindrical member 6 carries a pin 9that passes through a hole 10 in the sand strip, extension 4, and thesaid extension 4 is provided with a longitudinal, beveled slot 11inwhich is a lug 12 thicker than the sand strip that projects above thesand strip and the extension A coil spring 13 secured to the cope bymeans of screws 13 and extending around the corner and engaging the pin9, operates to maintain the sand strip urged toward its nward position.

As previously stated, the object of my invention is to eliminate thebinding of the sand strip by reason of the sand filling up the guideslots therein and preventing the strip from sliding, with respect topins passing therethrough, and to this end the body of the sand stripembodying my invention has preferably no perforations whatever, and inorder to properly guide the strip, and also to hold the strip to thecope, I provide pockets or straps of iron, 14, on the upper face of thestrip, into which project the ends of hooks'15 on the cope C. Thesepockets are sufficiently wide, that is to say, somewhat wider than thewidth of the hook 155, to permit the sand strip to have its normaldiagonal movement, and these pockets lie in recesses 16 in theunder-face of the cope, one wall 17 of which is substantially transverseto the side of the cope, and the other wall 18 of which is inclined,that is to say, is at an angle of about 45, so that when the sand stripis moved by the lever? and pin 9, the edge of the pocket nearest thesand strip extension 4: will move along the said wall 18. These pocketsare preferably, but not necessarily flush with the inner wall of thecope C when the sand strips are in their normal position, that is tosay, projected within the cope, the ends of the hooks 15 also projectpreferably through the pockets and flush with the inner wall of the vcope C so that when the sand strip'ismov'ed' relatively to the hooks andto the cope, any sand that may lodge between the hook and the walls ofthe pocket will be forcedout, in'

other words, the pockets will be self clearing. Where it is desirable,the ends of hooks 15 Fig. 6, may be directed in the lineof movement ofthe pockets 2'. e., at 45 to .the walls of a rectangular flask and thepockets or straps 14 be similarlydirected.

Another feature of my invention is to cut the sand strips away at thecorners of the cope as shown at 19, so that wh'en the sand strip is innormal position, the corners will be flush with the inner wall of thecope. The object. of this is to prevent the sand strips from forming agroove in the sand mold at the corners of the mold 'so that when amolding jacket is placed over a sand mold the corners will be solid,while the grooves formed by the sand strip would be entirely covered bythe sides of the jacket. Jackets of the automatically adjust able typeare usually open at the corners and by forming a mold with solid cornersat the jointbetween the cope and drag, there is less liability of thehot metal breaking through at the corners or at points near the cornersof the mold where it is unsupported by the sides of the jacket, orbreaking through the mold into the sand strip groove and following alongthe groove and rimning out at the unsupported or uncovered portionthereof.

In the modification shown in .Fig. 5 the lug 12 is not beveled,and inorder to hold the strip in place near the corner Iprovide an additionalhook 15 for engaging the sand strip near the corner. By virtue of thecorner pieces 2 and lugs 12 or 12 being thicker than the strip 5, thecope is supported on the drag at these points. The

sand strips being slightly thinner than the space between the cope anddrag will have the weight of the cope removed from them,

thereby, enabling them to be more easily withdrawn. Y i

In Fig. 2 the sand strip 5 is shown in normal position, and the one 5 v,in withdrawn position.

In the many types of flask I have hereto-.

vention be provided with a perforation 21 as shown in Figs. 7 and 8, butsuch perforations are not used for, nor do they perform the functions ofguide slots for the sand strlp. Their function is to permitthe movementof the sand strip relatively to the customary pins 01 that hold thecope'to the flask member next below, whether it be check or drag.

Where the patterns are of cast iron and form a part of a pattern platethat is clamped or held between the cope and drag in'some of the formsof flasks, the guide pins for the cope and drag must pass through suchplate. WVhere the pattern plate is of sufli-- cient size, a cope asillustrated in Fig. 1 can be used, but where the plate is not largeenough to extend over the pins,fthese pins must be positioned .closer tothe sides 0 of the flask and in some cases must pass through the widenedportion 20 of the'sand strips 5 or through the body portion of the stripitself. In the latter case the pins d are not on brackets attached tothe sides of the flask as in Figs. 1 and 7, but are secured directly inthe sides 0 of the cope and-drag as shown in Fig. 8. These perforations21 are wider than the pins (Z so ,that any sand that may accidentallyget into the perforations will be forced past, the pins when the sandstrips are withdrawn, thereby being prevented from packing between a pindand the end of the perforation.

. The perforation shown at out through 'to the inner edge ofone of thesand strips in this figure,'thus effectually preventing any clogging by'sandbeing 21%, Fig. 8, is j crowded between the pin and end of theslot. Such a structure is always self-cleang 'I elaim stantiallyparallel to the guiding edges of said corner pieces.

3. The combination with a cope, of corner plates, sand strips and sand.strip guide lugs, the corner plates and guide lugs being thicker thanthe sand strips, and hooks for guiding the sand strips.

4. A sand strip free from guide slots in its body, pockets on the strip,and means engaging the pockets.

5. A sand strip free from guide slots in its body, and having cut awayportions at the corners of the cope to lie flush with the inner walls ofthe cope when in normal position, and means for connecting a sand stripto the cope.

6. The combination with a cope, ofa sand strip having a slottedextension at the corner of the cope, a lug passing through theextension, straps on the sand strip near its ends and said extension,and hooks on the cope entering said straps.-

7. The combination with a cope, of a sand strip having straps thereon,hooks secured to the cope whose hook-ends enter the straps, the sidesofthe cope provided with recesses for receiving the straps, one end wallof which is substantially transverse of the cope side and the other endwall of which is sub stantially parallel to the line of movement of thestrip, said straps and the ends of the hooks therein being substantiallyflush with the inner walls of the cope.

8. The combination with a flask member, of a sand strip having a strapthereon forming a pocket substantially in the line of the movement ofthe strip, and a hook on said member whose end projects into said pocketand is directed also substantially in'the line of movement of the strip.

9. The combination with a flask member, of asand strip having strapsthereon forming pockets substantially in the line of movement of thestrip and hooks'on said member, whose ends project into said pockets andare directed also substantially in the line of movement of the strip,said straps and the hookends therein being flush with the wallsof thecope when the strip is in normal position.

10. The combination with a cope member and a drag; of means secured tothe alternate corners of one of the membersto space clearance spfiicientto permit the sand strips to be operated and by which the extreme endsof said strips are guided during their operation. i i i 12. Thecombination with a cope, of a sand strip withdrawable in straight lineshaving a. corner extension and sand strip operating means arranged tooperatively engage said extension.

13. The combination with a cope and a withdrawable sand strip thereon;of means on the cope to support the cope at its corners when placed onits drag, corner extensions on the sand strip, and manually actuatedsandstrip operating means in operative engagement with said extension.

14. The combination with a cope and its guide pins; of a withdrawablesand strip having a perforation of greater diameter than a cope guidepin and of suflicient length to permit the withdrawal of the strip.

15. The combination with a molders flask having guide pins forpositioning the cope with respect to the drag, said pins mounteddirectly in the walls of the flask; of a withdrawable sand stripfreefrom guide slots and having a perforation of greater width than thepins of sufficient length to permit the withdrawal of the strip.

16. The combination with a flask member and a guide pin; of awithdrawable sand strip having a perforation of greater diameter thansaid pin, said strip being cut away between said perforation and theinner edge of the strip.

17. A withdrawable beveled sand strip cut away at the corners of theflask to leave no impression at the corners of the sand ber; of cornerplates at alternate corners,

and sand strips extending over two sides of said member, and means atthe corner of each strip for actuating them, whereby the plates andcorners of the strips are arranged at alternate corners of the flaskmember.

21. The combination With a flask member, of a Withdravvable sand striphaving two portions, adapted to support the sand mold, at an angle toone another and having an extension outside of the member at the apex ofthe angle common to both of said portions and directed in the line ofdraft of the stri 255 The combination With a flask member having guideplates thereon, ofa sandstrip having a cut-away portion that will leaveno impression in the sand mold, and also having its ends in slidingrelation to said 15 guide plates, and an operating extension between theends of the strip.

In testimony that I claim the foregoing as my invention, T have signedmy name in.

presence of two subscribing Witnesses.

CHAS. O. W'OODJ Witnesses:

E. H. PARKINS, HENRY ORTH, Jr.

